César Chávez organized a .

Explanation:

He garnered national attention in 1965 when he joined forces with the Agricultural Workers Organizing Committee to strike against California grape growers. In 1966, the unions merged to form the United Farm Workers. For years, Chavez battled the grape growers for better compensation and improved work conditions.

here are some events that to cause increased conflict between the north and south

1) mexican cession- gaining modern day california, utah, arizona, and new mexico from mexico. caused southern and northern politicians to fight over whether or not there would be slavery in these newly acquired territories.

2) uncle tom's cabin- this famous book described the cruelty of slavery in the south during the antebellum period, causing more northerners to support abolition and southerners to resent the book as they felt it unfairly depicted southern society.

3) kansas- nebraska act- disagreements over whether or not kansas and nebraska would be free or slave states caused issues between northern and southern politicians in congress.

4) bleeding kansas- this fighting took place in kansas after congress allowed this territory to vote on whether or not they would have slavery. citizens were killed and buildings were destroyed during this fighting.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories